#lecturenotes{
    border: 0px solid;
    margin: 0;
    padding: 0;
}
#lecturenotes li{list-style: none;}
#lecturenotes > li:first-child{
    border-top: 2px solid #000;
}
#lecturenotes > li{
    border: 2px solid #000;
    border-top: 0px;
    padding: 10px;
    width: 300px;
    overflow: hidden;
    margin-right: 10px;
    cursor: pointer;
    color: white;
    
    background: #00b7ea; /* Old browsers */
    background: -moz-linear-gradient(top,  #00b7ea 0%, #009ec3 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#00b7ea), color-stop(100%,#009ec3)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top,  #00b7ea 0%,#009ec3 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top,  #00b7ea 0%,#009ec3 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top,  #00b7ea 0%,#009ec3 100%); /* IE10+ */
    background: linear-gradient(to bottom,  #00b7ea 0%,#009ec3 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00b7ea', endColorstr='#009ec3',GradientType=0 ); /* IE6-9 */
}
#lecturenotes > li:hover{
    color: #000;
    
    background: #f0f9ff; /* Old browsers */
    background: -moz-linear-gradient(top,  #f0f9ff 0%, #cbebff 47%, #a1dbff 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#f0f9ff), color-stop(47%,#cbebff), color-stop(100%,#a1dbff)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top,  #f0f9ff 0%,#cbebff 47%,#a1dbff 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top,  #f0f9ff 0%,#cbebff 47%,#a1dbff 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top,  #f0f9ff 0%,#cbebff 47%,#a1dbff 100%); /* IE10+ */
    background: linear-gradient(to bottom,  #f0f9ff 0%,#cbebff 47%,#a1dbff 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f0f9ff', endColorstr='#a1dbff',GradientType=0 ); /* IE6-9 */
}
#lecturenotes > li > span > a{
    border: 1px solid;
    display: block;
    float: right;
    padding: 7px;
    color: blue;
    text-decoration: none;
    background: white;
}
#lecturenotes > li > span > a:hover{
    color: #000;
    
    background: #e1ffff; /* Old browsers */
    background: -moz-linear-gradient(top,  #e1ffff 0%, #e1ffff 7%, #e1ffff 12%, #fdffff 12%, #e6f8fd 30%, #c8eefb 54%, #bee4f8 75%, #b1d8f5 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#e1ffff), color-stop(7%,#e1ffff), color-stop(12%,#e1ffff), color-stop(12%,#fdffff), color-stop(30%,#e6f8fd), color-stop(54%,#c8eefb), color-stop(75%,#bee4f8), color-stop(100%,#b1d8f5)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top,  #e1ffff 0%,#e1ffff 7%,#e1ffff 12%,#fdffff 12%,#e6f8fd 30%,#c8eefb 54%,#bee4f8 75%,#b1d8f5 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top,  #e1ffff 0%,#e1ffff 7%,#e1ffff 12%,#fdffff 12%,#e6f8fd 30%,#c8eefb 54%,#bee4f8 75%,#b1d8f5 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top,  #e1ffff 0%,#e1ffff 7%,#e1ffff 12%,#fdffff 12%,#e6f8fd 30%,#c8eefb 54%,#bee4f8 75%,#b1d8f5 100%); /* IE10+ */
    background: linear-gradient(to bottom,  #e1ffff 0%,#e1ffff 7%,#e1ffff 12%,#fdffff 12%,#e6f8fd 30%,#c8eefb 54%,#bee4f8 75%,#b1d8f5 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#e1ffff', endColorstr='#b1d8f5',GradientType=0 ); /* IE6-9 */
}
#lecturenotes > li > span > a:hover{
    text-decoration: underline;
}
/*#lecturenotes > li > a{
    border: 1px solid;
    display: block;
    padding: 10px;
    /*float: left;
    clear: both;*/
    /*width: 200px;
}*/
#lecturenotes li > ul{
    clear: both;
    margin-left: 20px;
    list-style: circle;
    display: none;
}
#lecturenotes li > ul > li > a{
    display: block;
    padding: 10px;
}

#lecturenotes .none{display: none;}